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Morphologically, the group presents complex taxonomy, particularly in\n                    <jats:italic>Eugenia<\/jats:italic>\n                    , which is subdivided into 11 infrageneric sections. The search for new morphological characters is crucial for delimiting and identifying species and infrageneric groups. In this context, colleters (glandular structures involved in the protection of leaf and floral primordia) remain poorly explored. This study investigated the presence, morphology, and distribution of colleters across Eugeniinae to assess their taxonomic relevance. A total of 221\n                    <jats:italic>Eugenia<\/jats:italic>\n                    species, representing all infrageneric sections, and seven Brazilian\n                    <jats:italic>Myrcianthes<\/jats:italic>\n                    species were analyzed. Herbarium specimens were used for morphometric and scanning electron microscopy analyses, as well as for correlations between colleters and other variables. Results revealed extensive variation in colleter morphology and distribution across vegetative and reproductive axis, with euriform shapes predominating in\n                    <jats:italic>Eugenia<\/jats:italic>\n                    and conical forms in\n                    <jats:italic>Myrcianthes<\/jats:italic>\n                    . Colleters were mostly associated with drier environments and were absent in glabrous species, suggesting a relationship with indumentum. Morphometric analyses indicated overlap among most groups, except for\n                    <jats:italic>E<\/jats:italic>\n                    . sect.\n                    <jats:italic>Schizocalomyrtus<\/jats:italic>\n                    ,\n                    <jats:italic>E<\/jats:italic>\n                    . sect.\n                    <jats:italic>Racemosae<\/jats:italic>\n                    , and non-American\n                    <jats:italic>Eugenia<\/jats:italic>\n                    species, which exhibited distinct patterns. Overall, homogeneous colleters (the predominant type in the subtribe) emerged as promising auxiliary diagnostic characters for Eugeniinae taxonomy, particularly when combined with other morphological traits.\n                  <\/jats:p>","DOI":"10.1007\/s10265-026-01756-7","type":"journal-article","created":{"date-parts":[[2026,9,19]],"date-time":"2026-09-19T22:50:44Z","timestamp":1789858244000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Colleter diversity across Eugeniinae (Myrtaceae): morphology, occurrence and taxonomic implications"],"prefix":"10.1007","author":[{"ORCID":"https:\/\/orcid.org\/0009-0005-0696-8447","authenticated-orcid":false,"given":"Vin\u00edcius L.","family":"Denardi","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9564-1163","authenticated-orcid":false,"given":"Karinne S.","family":"Valdemarin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7603-435X","authenticated-orcid":false,"given":"Eve J.","family":"Lucas","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-7823-7085","authenticated-orcid":false,"given":"Manoj K.","family":"Mahto","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7815-7209","authenticated-orcid":false,"suffix":"Jr","given":"Jehov\u00e1","family":"Louren\u00e7o","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-8827-4669","authenticated-orcid":false,"given":"Jo\u00e3o V.","family":"Dias","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2604-6088","authenticated-orcid":false,"given":"Fiorella F.","family":"Mazine","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,9,20]]},"reference":[{"key":"1756_CR78","doi-asserted-by":"crossref","unstructured":"B\u00fcnger MO, Mazine FF, Forest F, Bueno ML, Stehmann JR, Lucas EJ (2016a) The evolutionary history of Eugenia sect. 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